Inversion leson

INVERSION (đảo ngữ)
When the following words or phrases are used at the beginning of the sentence, the rest of it has an interrogative structure.
EMPHASIZED WORD + AUX + S + BARE INF
1 never, rarely, seldom
Never had we seen such an event!
(we had never seen such an event)
2 hardly… when, scarcely… when (hiếm khi nào… thì) , no sooner… than (NGAY KHI)
No sooner had I sat down than the bell rang.
As soon as I sat down, the bell rang.
3 only by, only in this way, not only… but also…, only then
Only then did I realize whom I was talking to.
4 not (even) once…, not often…
Not once did you call for help.
5 on no account, in no way, under no circumstances, by no means, at no time
Under no circumstances should this door be left unlocked.
= you always have to lock this door.
6 little, nowhere, in vain
Little did he know what he was about to encounter.
7 so + adj / adv… that; such (a) + adj + noun… that
So filthy were his clothes that we all gagged from the smell.
= His clothes were so filthy that…
Such an awful time did we have that we left after only thirty minutes.
We had such an awful time that…
NOTE only after…, only when…, only if…, not until / till…, have the inversion in the main clause:
Only when I called to cancel did I learn that the meting had been changed.
Not until you finish your homework can you go out to play.
Not until S + V + inversion
Inverted Conditionals:
- omit if - question order
If I were you, I would catch the next train out.
Inverted as...
Were I you, I would catch the next train out.
If I had known that, I wouldn’t have bothered to come.
Inverted as...
Had I known that, I wouldn’t have bothered to come.
If he should call, ask him to leave a message.
Inverted as...
Should he call, ask him to leave a message.
= If he should call, ask …
If he calls, ask him to leave a message.